Question

answer fastly please text the correct answer​

Answer 1

Answer:

1- |A| = 0

or, (x+4)(9-4)-2(21-16)+1(14-24) = 0

or, 5(x+4)-10-10 = 0

or, x+4 = 4

or, x = 0

2- |A| = -4

or, (2m+1)(30-8)-4[5(2+3m)-(1+4m)]+8(2+3m)-6(1+4m) = -4

or, 44m+22-4[10+15m-1-4m]+16+24m-6-24m = -4

or, 44m+22-36-44m+10 = -4

In the above equation 'm' is totally cancel out...

therefore, m = set of real numbers